lets see.. used to work.
ow 3pt don't work.. and remote does not lift an attachment? or did you use the ole xray vision on the hoses to determine no oil?
check oil in hyds sump
if it is good.
check pump prime at pump by pulling top/front plug out.
if it has oil there.
put the xrag goggles down and REALLY test the remotes for oil flow.
if the remotes have flow and pressure on an implement or a guage.. but no 3pt.. then i'd say it's the unlaoder vlave is stuck.